Non-skidding device.



K.-KEMPNY.

NN-SKIDDING DEVICE.

APPLICATION FILED MAY 24, |917.

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2 SHEETS-SHEET I K. KEMPNY.

NON-SKIDDING DEVICE. APPLKCATION FILED MM2-1.1911.

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Patented Nov. 2G, 191?.

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It Will be further evident that the parts employed are simple in their nature and `well adapted to perform the functions ex .pected of them.

' Having thus described my invention, what I claim as new and desire to secure by Letters Patent, iszi Y :1. In a device of the class described, the combination with a wheel having a fixed center, a rim circunijacent thereto, and a tread secured toy said rim, of a ring semirotatably engaged with said iixed center, a plurality of radially disposed spurs extending through said rim and tread engageable with said ring',V means formed with said spurs and said ring whereby the spurs may be moved longitudinally, a second plurality ofspurs spaced intermediately between the first named spurs, and levers connecting be- Gopies of 'this patent may be obtained for tween the irst and second of said spurs whereby the second series of spurs may be operated. Y

,2. In a non-skiddiiig wheel, the combination with a pair of rigid side plates, a center secured therebetween, a rigid Irim, and a tread secured to said rim, of an annular ring,'meaiis Vwhereby said ring may be rotated, said ring being `mounted Within a recess linsaid ixed center", a `plurality ofV 4cams formedjin said ring, spurs slidable through said tread andrim, Shanks formed with said spurs engageablewith said cams in said ring, intermediate j spurs disposed loe-V tween said rst named spurs, levers pivoted inpai'rs betweensaid plates, one of said pair of leversoperatively engaging one of the second named spurs, and the other of said levers being operable by one of the first named spur elements so that upon the rotation of said ring all ofv said spurs may be retracted 0r pro]ee`ted. y

In testimony whereof I have affixed `my signature. a

KAROL KEMPNY.

ve cents each, by' addressing the Commissioner oi! Patents, Washington, D. C. 

